[Amps] Thanks for the 3CX2500F3 Info

Ronald Lumachi w2cqm at juno.com
Wed Feb 25 07:31:19 EST 2004


Many thanks to the knowledgeable guys out there who graciously
contributed information in response to my query about the Svetlana
3CX2500F3 in a typical grounded grid  linear amateur radio amplifier
application. The response consensus suggests the following:
        a. poor amplification factor negates the choice of this tube in
the planned format  
        b. makes a better shop heater than a tube because of the high
filament current (51amps)
        c. tube is expensive to replace and few are available on the
surplus market in the event someone                 would consider
replicating the project. 
Glad I asked! Fortunately, I planned this deck with "zippers" so swinging
over to another tube choice  would be no big deal. I have 4 Russian
GS35B's hanging around that I guess I could try. My first choice is the
Eimac 8877. Have a few of those  but thought it was time for a change.
It's a bit boring doing the same thing all the time. Best 73's Ron
W2CQM/3


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